Brachyura

Also known as true crabs, true crab

thumb|Gecarcinus quadratus, a [[land crab from Central America]]

OverviewAI-generated

Brachyura, commonly known as true crabs, is an infraorder within the taxon Pleocyemata. Described by Latreille in 1802, this group includes organisms found in marine, brackish, and freshwater habitats. The scientific name is also referred to as krabber or Krabben. The Unicode character 🦀 represents the topic.

Records of Brachyura appear in various databases, including 29,921 occurrences in GBIF and 2,388 records in iDigBio. Specimens are held by institutions such as ALMNH, CAS, UCMP, and SIO in countries including the United States, Brazil, the Philippines, Mexico, and Malaysia. The subject is referenced by 1,324 other encyclopedia articles.

Nutritional data for crab products indicates 129 kcal of energy, 25.9 grams of carbohydrates, and 5.9 grams of proteins per serving. The fat content is 0 grams, with 4.7 grams of sugars and 2.24 grams of salt. The product holds a Nutri-Score of A and a NOVA classification of 4.

Synthesized by Vinony from 51 facts across 8 sources: Wikidata, GBIF, PubMed, Gbif Occ, Openfoodfacts, WoRMS, iDigBio, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Species

crabs

Brachyura

FAMILY

KingdomAnimalia
PhylumArthropoda
ClassMalacostraca
OrderDecapoda
FamilyBrachyura

Habitatmarine, brackish, freshwater

Observations recorded29,921

Krabbe ist eine Weiterleitung auf diesen Artikel. Weitere Bedeutungen sind unter Krabbe (Begriffsklärung) aufgeführt. Die Krabben (Brachyura) – auch Echte Krabben oder Kurzschwanzkrebse – sind mit ca. 6.800 Arten die größte Infraordnung der Ordnung Zehnfußkrebse (Decapoda). Die meisten Krabbenarten leben im Meer, einige aber auch im Süßwasser (siehe Süßwasserkrabbe) oder an Land. Krabben haben einen zu einer kurzen Schwanzplatte umgebildeten Hinterleib (Pleon), der umgeklappt unter dem Kopfbruststück (Cephalothorax) liegt – der Zwischenraum dient bei den Weibchen als Brutraum. Die männlichen Begattungsorgane (Gonopoden) der Krabben leiten sich von doppelästigen Spaltfüßen ab, wobei letztere sich bei den Weibchen noch als Pleopoden finden (diese werden bei der Brutpflege eingesetzt und können hunderttausende Eier tragen). Bei den Männchen sind Pleopoden rückgebildet oder ganz verschwunden. Nur die beiden ersten Pleopodenpaare sind regelmäßig als Gonopoden erhalten: Das erste Paar ist röhrenartig, das zweite meist fadenförmig und in der Röhre des ersten gelegen, vermutlich nach einem Kolben-Pumpen-Prinzip. Das erste Beinpaar des Rumpfes ist zu großen Scheren umgebildet, die Augen sit

via GBIF

Museum specimens

Specimen records: 2,388
With media: 254
Family: Brachyura
Collections: ALMNH, CAS, UCMP, SIO
Recorded in: United States, Brazil, Philippines, Mexico, Malaysia, Venezuela, Honduras, Fiji

iDigBio →

Nutrition · Open Food Facts

Typical values per 100 g · averaged across 22 products

aNutri-Score

4NOVA · Ultra-processed food

Energy: 129 kcal
Fat: 0 g
— of which saturates: 0 g
Carbohydrates: 25.9 g
— of which sugars: 4.7 g
Fibre: 0 g
Protein: 5.9 g
Salt: 2.24 g

Browse on Open Food Facts →

via Open Food Facts · ODbL

Research

8,544 papers

Convergent Adaptation of True Crabs (Decapoda: Brachyura) to a Gradient of Terrestrial Environments.Systematic biology · 2024Wolfe JM, Ballou L, Luque J et al.DOI: 10.1093/sysbio/syad066
A new species of Afropinnotheres Manning, 1993 (Crustacea, Brachyura, Pinnotheridae) from southwestern India, the first record of the genus from the Indian Ocean, with a review of the Pinnotheridae of India and adjacent seas.ReviewZootaxa · 2015Ng PK, Kumar ABDOI: 10.11646/zootaxa.3947.2.8
Shallow-water Trapezioidea (Decapoda: Brachyura) from the South China Sea, including two new records, and notes on Tetralia glaberrima Herbst, 1790.Zootaxa · 2024Sun YL, Jiang W, Sha ZLDOI: 10.11646/zootaxa.5476.1.30
A review of Chiromantes obtusifrons (Dana, 1851) (Decapoda: Brachyura: Sesarmidae), with descriptions of four new sibling-species from Christmas Island (Indian Ocean), Guam and Taiwan.ReviewZootaxa · 2013Davie PJ, Ng PKDOI: 10.11646/zootaxa.3609.1.1
Mitogenome selection shaped the terrestrial adaptation of Grapsidae (Decapoda: Brachyura).Gene · 2024Wang Z, Xu Z, Chen H et al.DOI: 10.1016/j.gene.2024.148594
A new genus and new species of freshwater crab (Decapoda: Brachyura:Gecarcinucidae) from the Central Western Ghats of India.Zootaxa · 2023Pati SK, Bajantri PP, Hegde GDDOI: 10.11646/zootaxa.5285.1.7
A novel neo-sex chromosome in Sylvietta brachyura (Macrosphenidae) adds to the extraordinary avian sex chromosome diversity among Sylvioidea songbirds.Journal of evolutionary biology · 2022Sigeman H, Zhang H, Ali Abed S et al.DOI: 10.1111/jeb.14096
Evolutionary history of true crabs (Crustacea: Decapoda: Brachyura) and the origin of freshwater crabs.Molecular biology and evolution · 2014Tsang LM, Schubart CD, Ahyong ST et al.DOI: 10.1093/molbev/msu068

via PubMed

~18 min read

Encyclopedic overview

15 sections

Contents

Biology
Description
Life cycle
Behaviour
Evolution
Fossil history
Taxonomic history
External phylogeny
Internal phylogeny
Families
Human consumption
Fisheries
Crabs as food
Cultural influences
References

thumb|Gecarcinus quadratus, a [[land crab from Central America]]

Brachyura is an infraorder of decapod crustaceans comprising the true crabs. They typically have a very short projecting tail-like abdomen, usually hidden entirely under the thorax. Their exoskeleton is often thickened and hard. They generally have five pairs of legs, and the frontmost pair end in chelae, which function as pincers. They are present in all the world's oceans, in freshwater, and on land, often hiding themselves in small crevices or burrowing into sediment. True crabs are omnivores, feeding on a variety of food, including a significant proportion of algae, as well as detritus and other invertebrates. True crabs are widely consumed by humans as food, with over 1.5 million tonnes caught annually.

Excerpted from Wikipedia’s “Brachyura” article, available under the CC BY-SA 4.0 licence.